1 /* Handle list of needed message catalogs
2    Copyright (C) 1995-1999, 2000-2001, 2003 Free Software Foundation, Inc.
3    Written by Ulrich Drepper <drepper@gnu.org>, 1995.
4 
5    This program is free software; you can redistribute it and/or modify it
6    under the terms of the GNU Library General Public License as published
7    by the Free Software Foundation; either version 2, or (at your option)
8    any later version.
9 
10    This program is distributed in the hope that it will be useful,
11    but WITHOUT ANY WARRANTY; without even the implied warranty of
12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13    Library General Public License for more details.
14 
15    You should have received a copy of the GNU Library General Public
16    License along with this program; if not, write to the Free Software
17    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
18    USA.  */
19 
20 #ifdef HAVE_CONFIG_H
21 # include <config.h>
22 #endif
23 
24 #include <stdio.h>
25 #include <sys/types.h>
26 #include <stdlib.h>
27 #include <string.h>
28 
29 #if defined HAVE_UNISTD_H || defined _LIBC
30 # include <unistd.h>
31 #endif
32 
33 #include "gettextP.h"
34 #ifdef _LIBC
35 # include <libintl.h>
36 #else
37 # include "libgnuintl.h"
38 #endif
39 
40 /* @@ end of prolog @@ */
41 /* List of already loaded domains.  */
42 static struct loaded_l10nfile *_nl_loaded_domains;
43 
44 
45 /* Return a data structure describing the message catalog described by
46    the DOMAINNAME and CATEGORY parameters with respect to the currently
47    established bindings.  */
48 struct loaded_l10nfile *
49 internal_function
_nl_find_domain(const char * dirname,char * locale,const char * domainname,struct binding * domainbinding)50 _nl_find_domain (const char *dirname, char *locale,
51 		 const char *domainname, struct binding *domainbinding)
52 {
53   struct loaded_l10nfile *retval;
54   const char *language;
55   const char *modifier;
56   const char *territory;
57   const char *codeset;
58   const char *normalized_codeset;
59   const char *special;
60   const char *sponsor;
61   const char *revision;
62   const char *alias_value;
63   int mask;
64 
65   /* LOCALE can consist of up to four recognized parts for the XPG syntax:
66 
67 		language[_territory[.codeset]][@modifier]
68 
69      and six parts for the CEN syntax:
70 
71 	language[_territory][+audience][+special][,[sponsor][_revision]]
72 
73      Beside the first part all of them are allowed to be missing.  If
74      the full specified locale is not found, the less specific one are
75      looked for.  The various parts will be stripped off according to
76      the following order:
77 		(1) revision
78 		(2) sponsor
79 		(3) special
80 		(4) codeset
81 		(5) normalized codeset
82 		(6) territory
83 		(7) audience/modifier
84    */
85 
86   /* If we have already tested for this locale entry there has to
87      be one data set in the list of loaded domains.  */
88   retval = _nl_make_l10nflist (&_nl_loaded_domains, dirname,
89 			       strlen (dirname) + 1, 0, locale, NULL, NULL,
90 			       NULL, NULL, NULL, NULL, NULL, domainname, 0);
91   if (retval != NULL)
92     {
93       /* We know something about this locale.  */
94       int cnt;
95 
96       if (retval->decided == 0)
97 	_nl_load_domain (retval, domainbinding);
98 
99       if (retval->data != NULL)
100 	return retval;
101 
102       for (cnt = 0; retval->successor[cnt] != NULL; ++cnt)
103 	{
104 	  if (retval->successor[cnt]->decided == 0)
105 	    _nl_load_domain (retval->successor[cnt], domainbinding);
106 
107 	  if (retval->successor[cnt]->data != NULL)
108 	    break;
109 	}
110       return cnt >= 0 ? retval : NULL;
111       /* NOTREACHED */
112     }
113 
114   /* See whether the locale value is an alias.  If yes its value
115      *overwrites* the alias name.  No test for the original value is
116      done.  */
117   alias_value = _nl_expand_alias (locale);
118   if (alias_value != NULL)
119     {
120 #if defined _LIBC || defined HAVE_STRDUP
121       locale = strdup (alias_value);
122       if (locale == NULL)
123 	return NULL;
124 #else
125       size_t len = strlen (alias_value) + 1;
126       locale = (char *) malloc (len);
127       if (locale == NULL)
128 	return NULL;
129 
130       memcpy (locale, alias_value, len);
131 #endif
132     }
133 
134   /* Now we determine the single parts of the locale name.  First
135      look for the language.  Termination symbols are `_' and `@' if
136      we use XPG4 style, and `_', `+', and `,' if we use CEN syntax.  */
137   mask = _nl_explode_name (locale, &language, &modifier, &territory,
138 			   &codeset, &normalized_codeset, &special,
139 			   &sponsor, &revision);
140 
141   /* Create all possible locale entries which might be interested in
142      generalization.  */
143   retval = _nl_make_l10nflist (&_nl_loaded_domains, dirname,
144 			       strlen (dirname) + 1, mask, language, territory,
145 			       codeset, normalized_codeset, modifier, special,
146 			       sponsor, revision, domainname, 1);
147   if (retval == NULL)
148     /* This means we are out of core.  */
149     return NULL;
150 
151   if (retval->decided == 0)
152     _nl_load_domain (retval, domainbinding);
153   if (retval->data == NULL)
154     {
155       int cnt;
156       for (cnt = 0; retval->successor[cnt] != NULL; ++cnt)
157 	{
158 	  if (retval->successor[cnt]->decided == 0)
159 	    _nl_load_domain (retval->successor[cnt], domainbinding);
160 	  if (retval->successor[cnt]->data != NULL)
161 	    break;
162 	}
163     }
164 
165   /* The room for an alias was dynamically allocated.  Free it now.  */
166   if (alias_value != NULL)
167     free (locale);
168 
169   /* The space for normalized_codeset is dynamically allocated.  Free it.  */
170   if (mask & XPG_NORM_CODESET)
171     free ((void *) normalized_codeset);
172 
173   return retval;
174 }
175 
176 
177 #ifdef _LIBC
libc_freeres_fn(free_mem)178 libc_freeres_fn (free_mem)
179 {
180   struct loaded_l10nfile *runp = _nl_loaded_domains;
181 
182   while (runp != NULL)
183     {
184       struct loaded_l10nfile *here = runp;
185       if (runp->data != NULL)
186 	_nl_unload_domain ((struct loaded_domain *) runp->data);
187       runp = runp->next;
188       free ((char *) here->filename);
189       free (here);
190     }
191 }
192 #endif
193